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基于生物质气化的绿色甲醇制备系统性能分析

现代化工 2025年第1期45卷 232-238页

作者：李博孙昊陈衡王奕楠孙颖刘文毅华北电力大学能源动力与机械工程学院北京102206 国网智能电网研究院有限公司北京102211

为提升生物质制备甲醇的效率并减少碳排放,提出了一种基于生物质秸秆气化的绿色甲醇制备系统。该系统以生物质为碳源,利用碱性电解水制取绿氢,并形成调节合成气制备绿色甲醇。通过Aspen Plus模拟系统流程,结果表明,虽然电解水增加了厂... 详细信息

为提升生物质制备甲醇的效率并减少碳排放,提出了一种基于生物质秸秆气化的绿色甲醇制备系统。该系统以生物质为碳源,利用碱性电解水制取绿氢,并形成调节合成气制备绿色甲醇。通过Aspen Plus模拟系统流程,结果表明,虽然电解水增加了厂用耗电量,但新提出的系统在碳转化率和综合能源效率方面均得到显著提升,分别为65.41%和69.47%。系统的效率为67.26%,显示该系统对有效能的利用率较高。系统动态回收周期为8.62 a,净现值为210.11万美元,单位产品能耗量为4.07 MWh,且单位能耗二氧化碳排放量低至0.04 t/GJ,表明该系统在经济效益以及环境保护方面具有一定优势。

关键词：生物质气化绿色甲醇热力学性质数值模拟效益评估

Long-Term Changes in Summer Extreme Wet Bulb Globe Temperature over China

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Journal of Meteorological Research 2021年第6期35卷 975-986页

作者： Dongqian WANG ying sun Laboratory for Climate Studies National Climate CenterChina Meteorological AdministrationBeijing 100081 Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044

The wet bulb globe temperature(WBGT)has important implication for human *** studies widely use the monthly data but rarely investigate the extreme WBGT because of data *** this study,we use 6-h station data to analyze the changes in the WBGT and three categories(intensity,absolute threshold,and frequency indices)of extreme WBGT indices in summers of *** is found that the spatial distributions of long-term trends in summer mean WBGT are consistent with those in the mean *** trend value of WBGT is smaller than the mean temperature,because of the decrease of relative *** the extreme indices,the intensity and frequency of WBGT and fixed threshold indices have *** increase of intensity indices and warm WBGT days and nights,and decrease of cold WBGT days and nights have been observed in most China,especially over northwestern *** number of days with daily maximum WBGT exceeding 31.4℃(WXge31)and minimum WBGT exceeding 27.9℃(WNge27)over southeastern China have increased since *** spread of probability distributions of WXge31,WNge27,and warm WBGT days and nights is becoming wider,reflecting increased variability of extreme *** addition,urbanization effects on the WBGT are *** impacts of urbanization on most of extreme WBGT indices are not detected,except for absolute thresholds *** may be due to the decrease of relative humidity in urban stations,which are almost two times larger than that in rural ***,we also note that the homogenization issue of humidity data may affect the conclusions.

关键词： wet bulb globe temperature(WBGT) extreme index long-term change urbanization effect

Boron neutron capture therapy: moving towards targeted therapy for locally recurrent head and neck squamous cell carcinoma

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Military Medical Research 2020年第2期7卷 239-241页

作者： ying sun Department of Radiation Oncology Sun Yat-sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapyGuangzhou 510060China

Locally recurrent head and neck squamous cell carcinoma(HNSCC)is often unresectable,and a repeat course of radiotherapy is associated with incremental *** neutron capture therapy(BNCT)is a novel targeted radiotherapy modality that can achieve a high dose gradient between cancerous and adjacent normal ***,the relationships among the dose resulting from BNCT,tumor response to BNCT,and survival are not completely ***,a study published in Radiotherapy and Oncology investigated the efficacy of BNCT in the treatment of patients with locally recurrent HNSCC and the factors associated with favorable treatment response and *** this article,the findings,strengths and limitations of this study are discussed in depth,and the significance of the study and motivations for future research are highlighted.

关键词： Locally recurrent head and neck squamous cell carcinoma Boron neutron capture therapy Treatment efficacy

Characteristics of extreme temperature and precipitation in China in 2017 based on ETCCDI indices

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Advances in Climate Change Research 2018年第4期9卷 218-226页

作者： YIN Hong sun ying Laboratory for Climate Studies National Climate Center China Meteorological Administration Beijing 100081 China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology Nanjing 210044 China

Based on the homogenized daily data in 2419 stations in China from 1961 to 2017, we calculated 26 extreme temperature and precipitation indices as defined by the Expert Team on Climate Change Detection and Indices (ETCCDI), and analyzed the characteristics of extreme temperature and precipitation in China in 2017. For China average, all the high temperature indices were above the 30-year average of 1961e1990 and the extreme low temperature indices are lower than their corresponding 1961e1990 average. The most extreme precipitations in 2017 were within the range of one standard deviation of precipitation change during 1961e2017. The annual minima of daily maximum temperature (TXn) and daily minimum temperature (TNn) reached the recorded highest level, while the number of cold nights (TN10p), cold days (TX10p), and cold spell duration index (CSDI) reached the recorded lowest values. Some indices were ranked at the second or third place since 1961, including annual maxima of daily maximum temperature (TXx) and of daily minimum temperature (TNx), warm nights (TN90p), frost days (FD), icing days (ID), summer days (SU), and growing season length (GSL). Other extreme temperature indices were ranked in the top 10 since 1961. Meanwhile, for the averaged extreme precipitation indices in China, seven out of the 10 extreme precipitation indices in 2017 were located within the range of one standard deviation, indicating a normal situation for extreme precipitation in 2017.

关键词： Climate warming Extreme temperature Extreme precipitation 2017

Deformation Temperature and Lamellar Thickness Dependency of FormⅠto Form Ⅲ Phase Transition in Syndiotactic Polypropylene during Tensile Stretching

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Chinese Journal of Polymer Science 2014年第9期32卷 1210-1217页

作者： ying Lu ying-ying sun Ran Chen Xiu-hong Li 门永锋 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences SSRF Shanghai Institute of Applied Physics Chinese Academy of Sciences

Phase transition from form Ⅰ to form Ⅲ in syndiotactic polypropylene crystallized at different conditions during tensile deformation at different temperatures was investigated by using in situ synchrotron wide angle X-ray diffraction technique. In all cases, the occurrence of this phase transition was observed. The onset strain of this transition was found to be crystalline thickness decided by crystallization temperature and drawing temperature dependent. The effect of drawing temperature on this phase transition is understood by the changes in mechanical properties with temperature. Moreover, crystalline thickness dependency of the phase transition reveals that this form Ⅰ to from Ⅲ phase transition occurs first in those lamellae with their normal along the stretching direction which have not experienced stress induced melting and recrystallization.

关键词： Tensile deformation Phase transition Syndiotactic polypropylene WAXD.

Effects of anthropogenic forcing and atmospheric circulation on the record-breaking welt bulb heat event over southern China in September 2021

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Advances in Climate Change Research 2022年第6期13卷 778-786页

作者： Dong-Qian WANG ying sun Climate Studies Key Laboratory National Climate CenterChina Meteorological AdministrationBeijing 100081China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044China

In September 2021,southern China witnessed an extreme high-temperature and high-humidity *** average regional wet bulb globe temperature(WBGT)anomaly(relative to 1961-1990 mean)in 110.0°-120.0°E,27.5°-32.5°N region was the highest on record at 3.28°C and exceeded three times the observed standard *** investigate the underlying causes,we examine the effects of anthropogenic forcings and anomalous circulation patterns on this event using the multi-model ensembles from the Coupled Model Intercomparison Project Phase *** indicate that 2021-like events would happen extremely rarely without anthropogenic warming(would not occur in counterfactual world simulations)and have become a 1-in-16-year event in the factual *** the threshold of the second most extreme year,the occurrence probability of extreme WBGT events increases approximately 50 times due to the impact of anthropogenic *** effect of anthropogenic warming under similar atmosphere circulation increases the probability of extreme WBGT events by 13-60 times,and that of corresponding circulation patterns under the same anthropogenic warming increases the probability by 1.3-1.8 times.

关键词： Extremely high WBGT event Extreme event attribution Anthropogenic influence Circulation effect

Characteristics of two transferable aminoglycoside resistance plasmids in Escherichia coli isolated from pig and chicken manure

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Frontiers of Environmental Science & Engineering 2019年第3期13卷 99-113页

作者： Chengjun Pu Xiaoyan Gong ying sun Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental Sciences China Agricultural University Beijing 100193 China

Plasmid-mediated antibiotic resistance genes (ARGs) have recently become a more prominent concern in the global environment. However, the prevalence of aminoglycoside resistance plasmids in the livestock industry is under reported. In this study, two transferable aminoglycoside resistance plasmids, pRKZ3 and pKANJ7, isolated from pig and chicken manure, were characterized. Results showed that pRKZ3 (8236 bp) is a non-conjugative IncQ plasmid and contains genes encoding for plasmid replication and stabilization (repA, repB and repC), mobilization (mob), and antibiotic resistance (arr-3 and aacA). pKANJ7 (30142 bp) is a conjugative IncX plasmid which codes for a type IV secretion system (T4SS). Conjugative transfer experiments showed that the optimal mating time of pKANJ7 was 8 h under the starvation condition, but the number of tranconjugants increased with time under the nutrient condition. Statistical analysis indicated that the two plasmids had little impact on the growth of their hosts, but a relatively high level of fitness cost due to pKANJ7 was observed. We also found that the fitness cost of plasmids depended on their hosts. Compared with pKANJ7, the relative fitness cost index of pRKZ3 varied within a narrow range during the 10 days of competition. The low level of fitness cost of pRKZ3 might contribute to the persistence of the plasmid in the environment. Our study provides new information for understanding the characterizations of antibiotic resistance plasmids (ARPs) in manure sources and helps to clarify the transfer and persistence of ARPs in the environment following the application of manure.

关键词： Escherichia coli Characteristics Aminoglycoside resistance plasmids Transfer Persistence

Multivariate stationary non-Gaussian process simulation for wind pressure fields

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Earthquake Engineering and Engineering Vibration 2016年第4期15卷 729-742页

作者： sun ying Su Ning Wu Yue Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology School of Civil Engineering Harbin Institute of Technology

Stochastic simulation is an important means of acquiring fluctuating wind pressures for wind induced response analyses in structural engineering. The wind pressure acting on a large-span space structure can be characterized as a stationary non-Gaussian field. This paper reviews several simulation algorithms related to the Spectral Representation Method （SRM） and the Static Transformation Method （STM）. Polynomial and Exponential transformation functions （PSTM and ESTM） are discussed. Deficiencies in current algorithms, with respect to accuracy, stability and efficiency, are analyzed, and the algorithms are improved for better practical application. In order to verify the improved algorithm, wind pressure fields on a large-span roof are simulated and compared with wind tunnel data. The simulation results fit well with the wind tunnel data, and the algorithm accuracy, stability and efficiency are shown to be better than those of current algorithms.

关键词： stochastic simulation non-Gaussian process static transformation method wind pressure field

Changes in extreme high temperature warning indicators over China under different global warming levels

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Science China Earth Sciences 2024年第6期67卷 1895-1909页

作者： Yuxia ZHANG ying sun Ting HU Chinese Academy of Meteorological Sciences Beijing 100081China National Climate Center Laboratory for Climate StudiesChina Meteorological AdministrationBeijing 100081China

High temperature warning indicators play a pivotal role in meteorological departments,serving as crucial criteria for issuing warnings that guide both social production and daily *** their importance,limited studies have explored the relationship between different global warming levels and changes in high temperature warning *** this study,we analyze data from 2,419 meteorological stations over China and utilize the Coupled Model Intercomparison Project Phase 6(CMIP6)models to examine historical changes in high temperature warning indicators used by the China Meteorological *** evaluate model performance and estimate future changes in these indicators using an annual cycle bias correction *** results indicate that since 1961,the number of high temperature days(TX35d and TX40d)and length of season(TX40d and TX40l)with daily maximum temperature reaching or exceeding 35℃ and 40℃ have increased over *** intensity of high temperatures(TXx)has strengthened and the geographical extent affected by high temperatures has *** 2022,the occurrence of 40℃ high temperatures surges,with Eastern China experiencing a two-day increase in TX40d and an extended seasonal length in TX40l by over five *** CMIP6 models have underestimated the high temperature indictors associated with 35℃ during historical periods,notable difference is not observed between the models and observations for TX40d and TX40l,given their rare ***,future projections,after bias correction,indicate that the increasing trends for 35℃ and 40℃ high temperature days and length of season become more pronounced than the raw projection,suggesting a more severe increase than that anticipated *** global warming intensifies,the high temperature days and length of season are projected to increase non-linearly,while the intensity of high temperatures is expected to increase *** every 1℃ increase in global temperature,the intensity is

关键词： Extreme high temperatures Meteorological warning CMIP6 Global warming levels Future projection